Question

A concave mirror produces magnification of +4. The object is placed
(a) at the focus
(b) between focus and centre of curvature
(c) between focus and pole
(d) beyond the centre of curvature

Answer 1

A concave mirror produces a magnification of +4 when the object is placed between the focus and the pole.

Explanation:

Provided:

 $m = \frac{h2}{h1} =\frac{-v}{u} = +4$

This shows that the image is erect and virtual. An erect and virtual image is formed in the case of the concave mirror only when the object is kept between the focus and pole. So, the option (c), which is “between focus and pole” is correct.

You can get all the answers of Chapter 4 in the link below:

https://brainly.in/question/14963178

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Answer 2

C is the answer

between focus and pole